Nice explanation, Alex!

I can't believe I have all sentences correct x)

Would you also confirm this? ->

I haven't been here yet. Я ещё не был вот. Wrong
What are you doing here? Что ты делаешь вот? Wrong

Here is my house ->
Мой дом находится здесь/тут. Is находится optional? In other words, can I omit it?
Вот/здесь/тут находится мой дом. Are these three versions correct with находится? Maybe the sentence "Вот находится мой дом" is wrong, isn't it?